Evaluation of the stress magnification factor in angled discontinuities of longitudinal stiffeners

Shuichi Yamatoki, Yoshitaka Hamamoto, Koji Gotoh

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

In ship hull design, longitudinal stiffeners may be twisted or knuckled to keep the continuity of strength along the vessel. This occurs at angled discontinuities such as discontinuous connections at the transverse web between two longitudinal stiffeners having different angles, e.g., a side shell longitudinal stiffener in the rounded part of the ship's hull. Although the criteria for selection of "twist", "knuckle", or "angled discontinuity" as it is should be strength criteria, there are no generalized criteria or published systematic studies, and ship hull designers usually depend on experimental rules. In this study we evaluate and compare the stress magnification factors and define the relative ratio between the stresses in the discontinuity and continuity structures by using finite element analysis from a strength-of-materials point of view. Our results show that under lateral load conditions the stress factor is larger in the twist structure than in the angled discontinuity structure, although under axial load conditions the stress factor in the knuckle and angle discontinuity structures is larger than in the twist structure. Additionally, we propose a formula that estimates the factor in the knuckle structure based on the strength-of-materials approach.

本文言語英語
ホスト出版物のタイトルStructures, Safety and Reliability
出版社American Society of Mechanical Engineers (ASME)
ISBN(電子版)9780791845431
DOI
出版ステータス出版済み - 1月 1 2014
イベントASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014 - San Francisco, 米国
継続期間: 6月 8 20146月 13 2014

出版物シリーズ

名前Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
4B

その他

その他ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014
国/地域米国
CitySan Francisco
Period6/8/146/13/14

!!!All Science Journal Classification (ASJC) codes

  • 海洋工学
  • エネルギー工学および電力技術
  • 機械工学

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